公开(公告)号：US20010031391A1

公开(公告)日：2001-10-18

申请号：US09773484

申请日：2001-02-02

申请人： SHIN-KOBE ELECTRIC MACHINERY CO., LTD.

发明人： Kensuke Hironaka ,  Kenji Nakai ,  Yoshimasa Koishikawa ,  Yuichi Takatsuka ,  Kenji Hara ,  Tomohiro Iguchi ,  Katsunori Suzuki ,  Koji Higashimoto ,  Takeshi Nakano

IPC分类号： H01M002/16 ,  H01M004/50 ,  H01M004/58

CPC分类号： H01M10/0525 ,  H01M2/06 ,  H01M2/1653 ,  H01M2/1686 ,  H01M2/30 ,  H01M4/505 ,  H01M6/10 ,  H01M2010/4292 ,  Y02T10/7011

摘要： A non-aqueous electrolytic secondary battery that can prevent a drop in the power even in a large current discharge is provided. Porosity of a separator is larger than or the same as porosity of a positive electrode mixture and a porosity of a negative electrode mixture. Particularly, the porosity of the positive electrode mixture is 20% to 50%, the porosity of the negative electrode mixture is 20% to 50%, and the porosity of the separator is 20% to 60%. The separator becomes rich in the volume of the electrolytic solution that infiltrates into interfacial aperture between the separator and the negative electrode. When the large current discharge is carried out in a short time, lithium-ions are released/occluded from the electrodes and the electrolytic solution can gain the released/occluded lithium-ions with a small interfacial resistance.

摘要翻译： 提供即使在大电流放电时也能够防止功率下降的非水电解二次电池。 隔膜的孔隙率大于或等于正极混合物的孔隙率和负极混合物的孔隙率。 特别是，正极合剂的孔隙率为20〜50％，负极混合物的孔隙率为20〜50％，隔膜的孔隙率为20〜60％。 分离器变得富含电解液的体积，其渗透到分离器和负极之间的界面孔中。 当在短时间内进行大电流放电时，从电极释放/吸收锂离子，并且电解液可以以较小的界面电阻获得释放/封闭的锂离子。